Reporting verbs offer and promise
Hello! I hope that somebody will explain me the rule:
The task is the following report the sentence, using the reporting verb in brackets.
1.I will join the protest. (promise)
She promised she would join the protest . or She promised to join the protest.
2.We will pay for the meal.(offer)
Last time we offered to pay for the meal. or Last time we offered we would pay for the meal.
I am looking forward to hear your answers with explanation, thanks in advance.